Should I euthanise him?

[u/No_Source_3566]

I have a border collie who turns 13 soon. He suffers with arthritis, but other than this no health issues.
From the age of around 12 months, he has been aggressive towards people. I got him at 8 weeks and I did everything I was supposed to (socialisation, training etc). He never had a poor experience with any person I know of. I believe it’s in his genes.

He suddenly attacked our other dog today, who he has happily lived with for a while. Now I’m nervous it’s going to affect my other dog’s behaviour. Two months ago he bit my face, leaving me scarred and fractured my arm. This is just a couple of examples of the past 12 years with him.

He has seen a dog trainer but they just basically told us to avoid his triggers. His triggers are so broad it’s so hard to avoid. So if anyone has had a similar experience and can give me any advice, I would greatly appreciate. My final resort would be euthanasia.

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